Are you willing to drop a United Airlines flight? Under the United Airlines flight cancellation policy, basic Economy bookings are non-refundable and non-alterable external 24 hours of buying. The cancellation request is subject to the penalty. The charge might change with the trip type, lodge class, and the passage rule related with the booking. In case of the death of a traveller, travelling companion, or immediate family member, the airline will waive the cancellation fee. The refund would apply to the unused segment.